| Owner | Manager | From | Until | | Canadian International Paper Company - Canada | | 1948 | 1979 |
| Bishop Marine Construction - Canada | | 1979 | 1981 |
| Great Lakes Marine Contracting Ltd. - Port Dover, Ontario | | 1981 | 1993 |
| Lower Lakes Towing Ltd. - Canada | | 1993 | 1996 |
| Nadro Marine Services - Port Dover, Ontario, Canada | | 1996 | 2018 |
| McKeil Work Boats Inc. - Hamilton, Ontario, Canada | | 2018 | |
|
| Fleet | From | Until | | Canadian International Paper Co. - Canada | | 1979 |
| Bishop Marine Construction Co. - Gananoque, Ontario | | 1981 |
| Great Lakes Marine Contracting Inc. - Port Dover, Ontario, Canada | | 1994 |
| Lower Lakes Towing Ltd. - Port Dover, Ontario, Canada | | 1996 |
| Nadro Marine Services - Port Dover, Ontario | | 2018 |
| McKeil Marine Ltd. - Hamilton, Ontario | 2018 | |
|